Sod should have a lot of om you just plowed down.
Is there some reason you don"t want to make any money from the field this year?You coulda harvested it for hay as it was, or you could plant soybeans on it this spring.
Wasting 2 crops of buckwheat, doing 3 heavy tillage operations in 12 months, I"m not getting what that accompishes but waste a lot of fuel & topsiol.
Sounds like something that came out of a book from someone who never actually farmed.....
Don"t mean to be harsh or critical - I"m sure the rest aren"t either, just if you want to farm, get to farming. That means raise something you can harvest.
If you want a plowdown to build the soil, plant spring wheat next year, put clover/alfalfa mix in it, harvest the wheat & straw, the legumes will ad N to the ground.
Tillage radishes planted after wheat will go deep & pull up nutrients from the subsoil, also help break up hardpan, as the radish decomposes the next spring itreleases the nutrients it brings up. _IF_ you have any nutirients in deeper to pull up....
Rye planted in fall will help with weed control & build biomass in very cool temps, moreso than anything else. Helps hold soil in place.
Don"t know what buckwheat will do for you special to grow it 2x, then follow with wheat. On top of an old grass. Seems like a mono culture that wouldn"t be good for your soil.
Just idle thoughts, not sure what you are working with or what your goals are so only you really know what works for you.
Me, I"d get beans in there with an innoculant on it & have something productive going on to build up the N in the soil while controling the weeds better.
--->Paul